I have my imac 24 connected wirelessly to my my 350n router, this router is running the lan and wireless N only. I have a wrt54g running a,b,g, it is connected to the lan port on the 350n and the internet port on it. Everything works great except my ps3 can't see my Imac with media link. I think I need to open some ports on the 350n........does this sound right.